The best statement that reflects the perspective of the men in the excerpt is: They surround White Fang’s mother to keep her from attacking them.
This interpretation fits well because the men are excited and approaching her, but there is a sense of caution indicated by White Fang's mother not resenting their actions, as well as the presence of the cub who is bristling but trying to submit. The men’s actions can be seen as a way to restrain or control the situation to prevent any potential threat from her.